Hello and welcome to the forum!
So, let's see what this engine is you have!
From the numbers you've posted;
Block Casting Number - 3914660 = 327 CID, 1968 (model year), 2 Bolt Mains
18T175553 - Engine Partial VIN Code - 1 = Chevy, 8 = 1968 (model year), T = Tonawanda, MI (engine assembly plant), 175553, Engine Partial VIN (last 6 digits of the vehicle VIN, matching numbers)
T1228HA - Engine Assembly Code - T = Tonawanda, MI (vehicle assembly plant), 1228 = December 28 (date code), HA = 1968 (model year), 327 CID, 4 spd tran, 275 HP, 4 BBL, full size/Camaro (body style)
Heads Casting Numbers - 3914291 = 1967 - 1968, 302/327/350 CID, Camel hump, no accessory holes, 64cc chamber (notes)
So, it looks like you've got a complete 275 HP, 327 CID 1968 engine!
Great engine!
Runs strong, can make a lot of HP, high revving!
So, what are you planning to do with your engine?
Don't be a stranger on the from, stop in from time to time and post info for us on what your doing with your 275 HP, 327!!
